866443616484741 has 12 divisors (see below), whose sum is σ = 1255136382001632. Its totient is φ = 575964440543016.

The previous prime is 866443616484737. The next prime is 866443616484769. The reversal of 866443616484741 is 147484616344668.

866443616484741 is a `hidden beast` number, since 8 + 6 + 6 + 4 + 43 + 61 + 6 + 484 + 7 + 41 = 666.

It is not a de Polignac number, because 866443616484741 - 2² = 866443616484737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 866443616484741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866443616474741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138719756161 + ... + 138719762406.

It is an arithmetic number, because the mean of its divisors is an integer number (104594698500136).

Almost surely, 2^{866443616484741} is an apocalyptic number.

It is an amenable number.

866443616484741 is a deficient number, since it is larger than the sum of its proper divisors (388692765516891).

866443616484741 is a wasteful number, since it uses less digits than its factorization.

866443616484741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277439518920 (or 277439518917 counting only the distinct ones).

The product of its digits is 1783627776, while the sum is 72.

The spelling of 866443616484741 in words is "eight hundred sixty-six trillion, four hundred forty-three billion, six hundred sixteen million, four hundred eighty-four thousand, seven hundred forty-one".